Cross-country ski machines. The trick to using Man Greens Reviewa cross-country ski machine effectively is to shift your weight from the ball of one foot to the ball of the other foot as your feet glide forward and backward. If you don't shift your weight, you'll just end up shuffling back and forth. It's helpful at the start to not use the arm mechanism at all. Just focus on your feet.
It's permissible to even stare at your feet at first. Once you master they rhythm of the movement, however, you should always look up so that you have good posture and don't get dizzy. Once you're comfortable with your feet, you can add the arm mechanism for extra intensity and upper-body toning. If you don't feet as if you're using your machine correctly, then go visit the store where you purchased it, and don't leave until the sales person has shown you how to use your machine properly.
Treadmills. If you would rather not walk in the rain, in dangerous neighborhoods, or in the dark, then a treadmill may be the solution.